Permian period
un. 二叠系；二叠纪\\n
🧩 词语组成解析
a. 二叠纪的, 二叠纪岩的\\nn. 二叠纪(岩)
period
['pɪrɪəd]
n. 时期;（一段）时间;学时;句号;
adj. 具有某个时代特征的;（关于）过去某一特定历史时期的;（家具、服饰、建筑等）某一时代的;
peri周围，靠近+od道路→周期
🗣️ 情景例句
Did you get a chance to get outside at all?
有时间出门吗？
My brother is twice as tall as your sister.
我弟弟比你妹妹高一倍。
I think our manager will persuade the government to let him build a new factory.
我想经理会说服政府让他建新厂的。